package com.wfw.service;

import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.redis.core.StringRedisTemplate;
import org.springframework.stereotype.Component;
import org.springframework.util.StringUtils;

@Component
@Slf4j
public class RedisLockService {
    @Autowired
    private StringRedisTemplate redisTemplate;

    public boolean lock(String key,String value){
        if (redisTemplate.opsForValue().setIfAbsent(key,value)){
            return true;
        }
        String currentValue=redisTemplate.opsForValue().get(key);
        if (!StringUtils.isEmpty(currentValue)&&Long.parseLong(currentValue)<System.currentTimeMillis()){
            String oldValue=redisTemplate.opsForValue().getAndSet(key,value);
            if (!StringUtils.isEmpty(oldValue)&&oldValue.equals(currentValue)){
                return true;
            }

        }
        return false;
    }

    public void unLock(String key,String value){
        try {
            String currentValue=redisTemplate.opsForValue().get(key);
            if (!StringUtils.isEmpty(currentValue)&&currentValue.equals(value)){
                redisTemplate.opsForValue().getOperations().delete(key);
            }
        }catch (Exception e){
            log.error("[redis分布式锁]解锁异常");
        }
    }

}
